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these photos of what remains of a pressure cooker which was used as the delivery device for the explosives. law enforcement sources tell nbc news the bombs were built to act like homemade ieds. sources tell nbc news the bombs included a battery pack and "the boston globe" reports investigators recovered a part of a circuit board at the scene. the bombs were packed with scha shrapnel. the bomb was not capable of creating a massive blast. instead, its main purpose was to maim and injure. photos obtained by whdh in boston showed the area where the bomb was left moments before and moments after the detonation. the fbi is looking at these photos and others like them for clues as to who placed the bombs and when. now there is precedent for devices like these. in 2004, the fbi sent out a memo on the use of homemade pressure cooker bombs. al qaeda's online magazine gave instructions for making them just last month and in the 2010 attempted attack on times square, one of the devices found included a pressure cooker and 125 firecrackers. meanwhile, the search of an apartment belonging to a foreign studen
stymied investigators and caused a lot of fear in the law community. >>> we'll begin in texas with search and rescue teams. they are combing through the debris in an incident at the west fertilizer plant. and i did say search and rescue, as the plant continues to smolder this afternoon, authorities are not ready to give up on finding survivors trapped in the rubble from the blast. it could be felt 50 miles away. we don't know yet how many people are missing, but they do include several members of the area's all-volunteer fire department. scores of people were injured in the blast. there's a heavy police presence, of course, in neighborhoods damaged by the blast. only search and rescue teams are being allowed in. there's been one isolated report of looting and many, many reports of neighbors helping neighbor. this all started when the fire broke out in the fertilizer plant in the tiny north central texas town of west, population 2,600. last evening, right as people wrapped up dinner. some drove closer to the plant to watch, that's when it exploded. >> you okay? >> i can't hear. i can't hea
be communicating to law enforcement officials. and there are new questions about whether the fbi dropped the ball after being warned by the russians in 2011 about cz tsarnaev's older brother, tamer ly tamerlan. nick paton walsh is in dagestan, and we have joe johns in washington, but we began with pamela brown with the latest on the investigation. >>> after a week of terror, chaos and heartache, the city of boston is still recovering. there are signs that life is starting to return back to normal here. there is a sense of relief after the arrest of the suspect, 19-year-old dzhokhar tsarnaev. now the focus is on what charges he will face and when. >> reporter: one week after two deadly bombings exploded in downtown boston killing three and injuring 183 people, the only surviving suspect remains in serious condition. as federal prosecutors prepare to bring charges against him, law enforcement sources say dzhokhar tsarnaev is unable to talk after a gunshot wound to the neck. exactly when he suffered this injury is still unknown. >> this is a complex investigation. and it's hard to say exactly how he
to find the person still there? >> well, absolutely. and that's why you've heard federal law enforcement officials say they're looking at planes coming in and out of boston, even as we speak. as the investigation is ongoing. and one of the things we ought to mention is on all of these component parts, investigators will be looking for latent fingerprints. they'll be looking for dna samples. because somebody had to touch it to put it together. so it's likely that they will have left some mark on this that will be distinctive to them. so all of this will come together to try and help them to quickly identify. what juliette says about it being a boston case is absolutely right. we looked at prior terrorism cases, both successful and unsuccessful cases that have been disrupted, and each time you trace back sort of the perimeter you find that devices are put together in close proximity to where the attack is actually launched. so that's -- investigators understand that and will begin to work from the crime scene outward. >> all right, fran townsend, juliette chi up, our thanks to you. >> let'
of the things we have been talking about in the last day and a half in this investigation is how law enfo e enforcement officials will be looking for a bomb-making signature. some sign that shows where the bomb was put together and where they received their instructions. as you're looking at these pictures, are these the types of things that give you a sense of these signatures? >> quite reminiscent of some major cases i worked on while with ncis. using a device like this, almost always there are components left behind. the crime scene processing and technicians making the initial assessment and even chemical tests are being matched up at the national center, tdac at quantico, virginia. it will be confirmed whether the device flagrated or detonated which would indicate a higher explosive. all of these things produce leads for investigators to run down. >> john and i were talking during the commercial break going back to the olympic park bombings in 1996, the process investigators went through finding the nails that shot out of the bomb, tracing the nails back to the manufacturer and finding
Search Results 0 to 4 of about 5